Surface Resistivity (rs)

The resistance across a surface element having unit length and unit width, expressed in ohm/square or ohm (Method : ASTM D257). In EOS/ESD S11.11-1993, a static dissipative packaging material is defined as having a surface resistivity equal to or greater than 1.0¥104W and less than 1.0 ¥ 1011 W, while an insulative packaging material has a surface resistivity equal to or greater than 1.0 ¥ 1011 W.